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Would this be 50431XU, 50389, 50688-52? Diag exam is to check ureters; not nephrostomy. I can't find a code for removal only of ureter stent. "History: Urology requests antegrade nephrostogram via right ext nephrostomy. If antegrade drainage through ureteral stent is identified into the urostomy, removal of both right and left ureteral stents is requested. Proc: Injection of contrast was performed with fluoro guidance to evaluate the nephrostomy tube. Antegrade nephrostogram demonstrates catheter to be in excellent position within the right renal pelvis. Right and left ureteral stents are in excellent position. There is brisk antegrade drainage through the right ureter/ureteral stent into the stoma. Both ureteral stents were then removed with gentle manual traction from the urostomy. No resistance was encountered. Next, the backend nephrostomy catheter was cut, reducing his retention loop and a 0.035 inch guidewire was placed through the nephrostomy tube, reducing the retention loop and the nephrostomy tube was removed under fluoro guidance."